We are unable to initiate the user transaction via the bridge program, DFHL3270 though all the necessary setup activities are done. We are not able to identify the root cause of the issue which is failing with AEXZ abend in DFHL3270 called Assembler program.

Below are the steps we followed for DFHL3270 bridge setup:

1)Defined the SIT parameters as specified in the IBM manual as per the link below

User response
Use the transaction dump to determine the cause of the failure. For further assistance, or if module DFHDUIO is not loaded and no transaction dump is available, contact your system programmer.

If you do not know how to analyze a transaction dump, contact your site support group. Or, you can pay a consultant to analyze the dump for you.

While debugging the AEXZ abend in the bridge link program, we ran the IBM utility (DFHDU630) to extract the CICS abend dump and found that the application is failing with KERNERROR during ALLOCATE_BRIDGE_FACILITY in the DFHBRNS utility. It’s also failing with KERNERROR in the DFHBRFR utility

On further analysis found that, this failure is happening in DFHBRNS module as per the below found from the IBM Trace Entries document.

After checking the dump closely, we were again able to identify the root cause.When checked the file entry for DFHBRNSF was only having read access enabled. We didn’t give all access to this file entry when it was created.

We had enabled all the access which includes the update access to this file entry (CICSTS31.CICS.CICSM.DFHBRN ) and enabled the File entry in CICSM.

We had then submitted the BRCO transaction and we are not getting the AEXZ issue now as shown below and there is no ABEND..

Now the BRCO , IBM supplied transaction for the CICS Bridge 3270 works fine.